Python Turtle：我想制作一个函数，该函数可以根据先前执行的函数执行另一个函数

Question

I'm drawing my name using turtles and I have a bunch of different functions for each of the letters

like so (for letter r)

def letter_r(t):

    def letter_r_top(t):
        turtle.lt(90)
        turtle.fd(150)
        turtle.rt(90)
        turtle.circle(-37.5,180)
        turtle.lt(130)

    def letter_r_leg(t):
        csquare = ((75**2) + (37.5**2)) 
        sidec = math.sqrt(csquare)
        turtle.fd(sidec)

    letter_r_top(rob)
    letter_r_leg(rob)

After each letter, i need to move the turtle into the right place to setup for the next letter. Because each of the letters are different sizes I need to make custom movements depending on what the previous letter is but I dont want to make separate functions for each of those movements.

At the end of my code I have the list of functions to be called in the correct order to spell my name

 letter_t(rob)
 letter_setup(rob)
 letter_r(rob)
 letter_setup(rob)
 .....

Is there a way that I can do something like this so that I will only need 1 setup function.(Not real code, just a conceptualization of what I'm thinking

def letter_setup(t):
    if previously executed function A 
        turtle.fd(75)
    if previously executed function B 
        turtle.fd(75)
        turtle.lt(90)
    if previously executed function C
        turtle.fd(75)
        turtle.lt(90)   

Answer 1

为什么不在上一个字母的末尾移动到下一个字母的正确位置？

Answer 2

Perhaps there is a better way to do this but you could make a variable last_function_called and in each function you give it a different value then you'll know wich one was the last called :

last_function_called = NONE;

def function1():
    last_function_called = FUNCTION1
    blablabla

...

if (last_function_called == FUNCTION1):
    call another one

and before of course something like :

NONE = 0
FUNCTION1 = 1
FUNCTION2 = 2
ect...